Adjustable timing cam for hot drink dispensers

ABSTRACT

A housing includes a heated water tank, two pairs of particulate food product cartridges from which metered servings are funneled into a cup along with hot water. The hot water vapors are blown out of the housing by a fan directing air downwardly past the agitation and metering scoop in the food cartridges and through the funnel out of the machine. A cup support shelf is provided below the funnel and heated water conduit and a float is provided therebelow connected to a switch for lighting a warning light should liquid in the bottom of the housing rise above a predetermined level. The electrical circuitry is also deenergized. A control switch is actuatable by the cup to insure the cup&#39;&#39;s presence before water or food product is discharged. A coin mechanism is provided in the housing and includes a first cam in the path of a coin for holding the coin which actuates a switch connected to a motor for rotating the cam shaft. A second cam will cause the motor to turn the cam shaft one full revolution after it has started turning by the coin actuating the switch. The coin is then dropped to the bottom of the coin mechanism. Upon the cam shaft making one complete revolution the first cam will again be in a position to receive the next coin to repeat the cycle. During the one revolution of the cam shaft food product cams will operate switches a predetermined number of times to cause solenoids connected thereto to discharge corresponding numbers of scoops of food product from the food cartridges. Still another cam controls the maximum quanity of water which can flow from a solenoid valve controlled water conduit such that no more than a cup of water will be discharged. The water cam is adjustable and includes coaxial overlapping portions which are engaged by the switch previously engaging the coin for the desired degrees of the one revolution of the cam shaft. Upon the coin dropping from the coin guide the switch actuating element moves through the coin guide for engagement with the adjustable cam.

United States Patent 91 Syverson i 1 ADJUSTABLE TIMING CAM FOR HOT DRINK DISPENSERS [75] lnventor: Martelle J. Syverson, Albert Lea,

Minn.

[73] Assignee: Fountain Industries, Inc., Freeborn County, Minn.

22 Filed: Mar. 27, 1972 21 Appl. No.: 238,447

Primary Examiner-Robert B. Reeves Assistant Examiner-Thomas E. Kocovsky Attorney, Agent, or FirmZarley, McKee & Thomte 571 ABSTRACT A housing includes a heated water tank, two pairs of particulate food product cartridges from which metered servings are funneled into a cup along with hot water. The hot water vapors are blown out of the housing by a fan directing air downwardly past the agitation and metering scoop in the food cartridges and [451 Feb. 26, 1974 through the funnel out of the machine. A cup support shelf is provided below the funnel and heated water conduit and a float is provided therebelow connected to a'switch for lighting a warning light should liquid in the bottom of the housing rise above a predetermined level. The electrical circuitry is also de-energized. A control switch is actuatable by the cup to insure the cups presence before water or food product is discharged. A coin mechanism is provided in the housing and includes a first cam in the path of a coin for holding the coin which actuates a switch connected to a motor for rotating the cam shaft. A second cam will cause the motor to turn the camshaft one full revolution after it has started turning by the coin actuating the switch. The coin is then dropped to the bottom of the coin mechanism. Upon the cam shaft making one complete revolution the first cam will again be in a position to receive the next coin to repeat the cycle. During the one revolution of the cam shaft food product cams will operate switches a predetermined number of times to cause solenoids connected thereto to discharge corresponding numbers of scoops of food product from the food cartridges. Still another cam controls the maximum quanity of water which can flow from a solenoid valve controlled water conduit such that no more than a cup of water will be discharged. The water cam is adjustable and includes coaxial overlapping portions which are engaged by the switch previously engaging the coin for the desired degrees of the one revolution of the cam shaft. Upon the coin dropping from the coin guide the switch actuating element moves through the coin guide for engagement with the adjustable cam.

9 Claims, 13 Drawing Figures memes M2 M4 sum 1 or 3 PAIENTH] H1326 I974 SHEET 2 (IF 3 ADJUSTABLE TIMING CAM FOR HOT DRINK DISPENSERS The most desirable vending machine is a machine that is trouble free, simple to operate and inexpensive to manufacture. The machine of this invention is suitable for use in a variety of locations includingoffices, homes and restaurants. In most places were coffee and other hot drinks are served it is necessary to prepare a fresh pot several times a day. The machine of this invention includes throw-away food cartridges for coffee and hot chocolate, for example, in addition to cartridges of non-dairy cream and sugar. Water may be plumbed into a heated holding tank in the machine. The use of particulate freeze-dry coffee, hot chocolate and the like make it unnecessary to prepare these drinks in advance. An agitation and metering scoop in the base of each of the product cartridges is connected to a solenoid in turn operated by a cam for reciprocating the scoop the required number of times to give a precise quantity of required food product. Use of the exact amount of freeze-dry food product is particulary important for giving the best drink possible and minimizing materials expense.

The hot drink dispensing machine of this invention also includes controls which allow the machine to be only operated safely and honestly. A coin is required to start the operation and a predetermined quantity of food product will be dispensed from the cartridge along with no more than one cup of heated water. A control switch is operated by a float under a cup support thus leakage of water will cause the system to be deactivated while a warning light is turned on.

A problem frequently encountered with the use of dry product mixed with water is that the fumes from the hot water will moisten the supply of product thus preventing it from flowing from its container. This is prevented in the dispensing machine of this invention by a fan blowing air from around the food product cartridges down into the area of the hot water discharge conduit feeding into the cup along with the food product and then out of the machine taking the water vapors with it and, of course, preventing the water vapors from rising to contaminate the particulate food product in the cartridges by entering the cartridges through the opening in which the agitation scoop is positioned.

This invention consists in the construction, arrange ments and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically pointed out in the claims, and illustrated in the accompanying drawings in which:

FIG. 1 is a front perspective view of the hot drink dispenser of this invention.

FIG. 2 is a cross sectional view taken along line 2 FIG. 7 is a cross sectional view taken along line 7 7 in FIG. 5 showing the starting cam holding a coin in the coin guide for actuating a motor starting switch.

FIG. 8 is a view similar to FIG. 7 but showing the starting switch being actuated by an adjustable cam after the cam shaft has started to turn causing the first cam to release the coin from the coin guide and engagement with the starting switch.

FIG. 9 shows the coffee cam having one cam surface for actuating a switch connected to a solenoid in turn connected to the scoop in the coffee cartridge.

FIG. 10 is a view showing the chocolate cam having a plurality of cam surfaces for actuating an associated switch in turn connected to a solenoid for operating a scoop in the chocolate food cartridge to give multiple metered scoops of chocolate.

FIG. 11 is a view showing the motor cam and a switch which is deactivated until the cam rotation has been started by the coin actuated switch.

FIG. 12 is a cross sectional view taken along line 12 12 in FIG. 7 showing alternate positions of the coin switch actuating element first engaging the coin and then after the coin has been released by the coin cam upon rotation thereof.

FIG. 13 is an electrical schematic.

The hot drink dispenser of this invention is referred to in FIG. I generally by the reference numeral 10 and includes a housing 12. A front wall 14 includes a cup support shelf 16 having space for two cups. A selection 2 in FIG. 1 showing the product and hot water flow and the air flow for removing hot water varpors from the machine.

FIG. 3 is a fragmentary perspective view of the particulate food funnels positioned below the food carswitch 18 is adjustable between a coffee position 20 and a chocolate position 22, as indicated by the related lights. Sugar and cream may be selected by a switch 24 and a'warning light 26 is provided for signalling when a float 28 has risen due to water 30 in the bottom of the housing 12 such that a switch 32 is actuated.

A coin mechanism 34 is positioned behind the front panel 14 to receive coins through an opening'36. Rejected coins are returned through an opening 38.

Inside the housing it is seen that water is plumbed into a heating storage tank 40 through a conduit 42 and is released from the tank through a conduit 44 controlled by a water solenoid valve 46. The lower end 48 of the water conduit 44 is positioned directly above a cup 50 on the support shelf 16 abutting the back side wall 52 of a particulate product funnel 54 such that food product and water are fed into the cup 50 simultaneously.

The funnel 54 is seen in FIG. 3 on a shelf 56. Two pairs of funnels 58 and 60 are provided, the funnel 58 adapted to receive coffee and chocolate in sections 62 and 64, respectively, while sections 66 and 68 of funnel 60 receive sugar and cream respectively. The forward walls 58 and 60 extend downwardly and rearwardly and cooperate with end walls 70 and 72 in funnel 58 and the rear wall 52 and center wall 72 to channel the food product to the throat 74 for feeding the cup 50. The

funnel 60 includes end walls 76 and 78 and center wall 80 feeding through a throat 82.

As seen in FIG. 4, four product cartridges are provided for feeding the respective funnel sections. Two larger cartridges 84 and 86 are provided for coffee and chocolate, respectively, while the smaller cartridges 88 and 90 are for the sugar and cream. A pair of solenoids 92 and 94 are connected to scoops 96 and 98 for the coffee and chocolate cartridges while solenoids 100 and 102 are connected to agitation and metering scoops 106 for the sugar and cream cartridges.

As seen in FIG. 2, the interior of the particulate material food cartridges is kept dry by a fan 108 blowing air as indicated by the arrows 109 downwardly from the top of the housing 12 along the cartridges and through the scoops 96, 98, 104 and 106 and then through the funnel sections 62, 64, 66 and 68 where the air then escapes past the cup 50 taking with it hot water vapors from the discharge end 48 of the water conduit 44. The normal tendency of the water varpors to rise through the funnels to contaminate the particulate material in the cartridges is thus overcome and prevented. A cup actuatable control switch 1 is provided having an actuating yoke element 112 and is operated by pushing the yoke 112 rearwardly with the cup 50 which, as will be described hereinafter, causes the controlling electrical circuits to be energized and thereby allow product and water to be dispensed. Accordingly, water and product can only be dispensed when a cup is in place ready to receive the water and the food product for mixing in the cup. The cup switch 110 and associated yoke 112 function to operate the coffee and chocolate solenoids 92 and 94 and water solenoid valve 46 while a yoke actuating element 114 connected to a switch 116 controls the sugar and cream solenoids 100 and 102.

The coin mechanism 34 includes a frame 118 having a front wall 120 and oppositely disposed rearwardly extending side walls 122. A coin guide 124 is formed by closely spaced together plates 126 providing a coin path 128 therebetween and extending from the coin slot 36 on the front wall of the dispenser housing 12, as seen in FIG. 1. A slot 130 is formed in the walls 126 in the path 128 of the coin such that the actuating element 132 of a microswitch 134 will be actuated by any coin 136, as seen in FlG. 7, when the coin is held by a coin cam 138 on a cam shaft 140 mounted between the frame side walls 122 and rotated by a motor 142. The cam 138 includes a trio of segmental disk plates sufficiently wide enough collectively to provide a support base for the coin 136. The peripheral length of the cam 138 may be as great as is needed. It is seen in the electrical schematic of FIG. 13 that upon the coin switch 134 being actuated by the coin 136 a circuit is established through the motor 142, the cup switch 110 and a switch 144 operated by a motor cam 146. It is seen in FIG. 11 that when the coin 136 is first inserted into the machine the switch 144 is in the position of the solid line in FIG. 13 but upon the motor 142 turning the earns the cam 146 moves the switch 144 to the dash line position of FIG. 13 making an alternate circuit through the motor 142. At this time, as seen in FIG. 8,

the cam 138 has moved away from alignment with the coin guide 128 thereby releasing the coin 136 to fall to the bottom of the coin mechanism and thereby allowing the coin switch 134 to open except that it moves then into engagement with an adjustable water cam 148, as seen in FIG. 9, thereby maintaining the switch 134 in its closed position. The cam 148 includes two relatively rotatable disk elements 148A and 1483 adjustable to provide a peripheral cam surface of between approximately 180 degrees to 360 or any other configuration as the conditions might warrant upon varying the shape of the component cam portions 148A and 1483. The adjustment of these cam portions 148A and 148B is made to keep the switch 134 closed sufficiently long for the water solenoid 146 to give no more than one full cup of water.

The switch 18 on the front of the dispenser 12 has been set for coffee and thus the coffee light 20 has been energized and the coffee solenoid 94 is actuated upon a switch 150 being operated by a coffee cam 152 having a single actuating cam surface 154. A single cam surface 154 is needed for coffee since only one scoop of coffee material is needed per cup and thus one solenoid operation will be sufficient. 1n the case of chocolate, with the switch 18 being turned to its right-hand position, the chocolate solenoid 92 will be actuated upon the switch 156 being operated by the plurality of cam shoulders 158 on the cam 160. Accordingly, the

desired number of scoops of chocolate may be pro-- vided by varying the number of cam shoulders 158. Thus it is seen that the coin switch 134 and the cup switch 110 function as master switches for operating the coffee and chocolate solenoids 94 and 92 in addition to the water solenoid 46. The motor 142 is initially dependent upon the switch 134 while the coin 136 is in a position on the cam 138 to close the switch 134 but after that the motor is in a circuit with the switch 144 which will remain closed for substantially a full revolution of the cam 146. It is reopened when the cam 146 returns to its position of F 1G. 11 with the actuating element of the switch being in the notch in the cam 146. Should water accumulate in the bottom of the machine in an excessive amount the float 28 will actuate the switch 32 to open the circuit through the coin switch 134 thereby rendering inactive the entire system until the problem has been corrected. At the same time the warning light 26 will go on as a circuit through it will have been established. The sugar and cream solenoids and 102 are seen to be operated by the switch 24 on the front of the dispenser housing 12 and the cup switch 116 actuatable by the yoke 114.

Thus it is seen that substantial simplicity has been built into a very effective hot drink machine which provides complete control over the dispensing of a variety of hot drink products such as coffee and chocolate milk.

1 claim:

1. A coin operated control system comprising,

a coin guide,

a switch having an actuating element in the travel path of a coin moving through said coin guide,

a cam shaft having a first cam positioned at times in the travel path of a coin moving through said coin guide, and a second cam on said cam shaft positioned adjacent to travel path of said coin and at times in the path of actuating movement for said actuating element such that after said motor starts to turn said first cam moves out of said coin travel path and said second cam moves into the path of actuating movement of said actuating element to maintain said switch actuated, said second cam including a pair of segmental cam elements in sideby-side relationship adjustably rotable relative to each other to provide a cam having the desired number of degrees of cam surface, and a motor connected to said cam shaft and said switch is connected to said motor whereby said motor will turn said cam shaft until said first cam rotates out of said travel path of said coin and said second cam moves out of the path of said actuating element. 2. The structure of claim 1 wherein said second cam and said coin travel path are in separate closely adjacent parallel planes.

3. The structure of claim 1 wherein a cup actuatable switch is connected between said water solenoid valve and said first switch to assure that a cup is in place to receive water upon said water solenoid valve being actuated.

4. The structure of claim 3 wherein a product solenoid is connected to a product switch and said cup switch, and a product cam is provided on said cam shaft for actuating said product switch at times, said product solenoid being connected to a scoop means in a product storage container whereby water and product will be placed in a cup at substantially the same time.

5. The structure of claim 1 wherein said switch and said motor are included in a first circuit and a second switch and said motor are included in a second circuit, a second cam is provided on said cam shaft and at times actuates said second switch, said first and second cams are arranged such that upon said first cam moving out of the coin travel path and said first switch being deactivated said second'cam is turned sufficiently to actuate said second switch to continue the operation of said motor.

6. The structure of claim 5 wherein in said motor operation is continued until said first cam returns to the travel path of said coin and said second cam deactivates said second switch whereby said cycle of operation may be repeated.

7. The structure of claim 5 wherein a water valve solenoid is connected to said first switch whereby the time of operation of said valve is controlled.

8. The structure of claim 7 wherein said adjustable segmental cam elements are set to allow the first switch to remain closed only long enough to give a predetermined quantity of water from said solenoid water valve.

9. The structure of claim 7 wherein a product solenoid is connected to a third switch and a third cam is provided on said cam shaft for actuating said third switch, said product solenoid being connected to a scoop means in a product storage container, and said third cam includes a plurality of cam actuating surfaces for actuating said third switch to provide a corresponding number of reciprocations of said scoop means to discharge the desired quantity of product from said product storage container. 

1. A coin operated control system comprising, a coin guide, a switch having an actuating element in the travel path of a coin moving through said coin guide, a cam shaft having a first cam positioned at times in the travel path of a coin moving through said coin guide, and a second cam on said cam shaft positioned adjacent to travel path of said coin and at times in the path of actuating movement for said actuating element such that after said motor starts to turn said first cam moves out of said coin travel path and said second cam moves into the path of actuating movement of said actuating element to maintain said switch actuated, said second cam including a pair of segmental cam elements in side-by-side relationship adjustably rotable relative to each other to provide a cam having the desired number of degrees of cam surface, and a motor connected to said cam shaft and said switch is connected to said motor whereby said motor will turn said cam shaft until said first cam rotates out of said travel path oF said coin and said second cam moves out of the path of said actuating element.
 2. The structure of claim 1 wherein said second cam and said coin travel path are in separate closely adjacent parallel planes.
 3. The structure of claim 1 wherein a cup actuatable switch is connected between said water solenoid valve and said first switch to assure that a cup is in place to receive water upon said water solenoid valve being actuated.
 4. The structure of claim 3 wherein a product solenoid is connected to a product switch and said cup switch, and a product cam is provided on said cam shaft for actuating said product switch at times, said product solenoid being connected to a scoop means in a product storage container whereby water and product will be placed in a cup at substantially the same time.
 5. The structure of claim 1 wherein said switch and said motor are included in a first circuit and a second switch and said motor are included in a second circuit, a second cam is provided on said cam shaft and at times actuates said second switch, said first and second cams are arranged such that upon said first cam moving out of the coin travel path and said first switch being deactivated said second cam is turned sufficiently to actuate said second switch to continue the operation of said motor.
 6. The structure of claim 5 wherein in said motor operation is continued until said first cam returns to the travel path of said coin and said second cam deactivates said second switch whereby said cycle of operation may be repeated.
 7. The structure of claim 5 wherein a water valve solenoid is connected to said first switch whereby the time of operation of said valve is controlled.
 8. The structure of claim 7 wherein said adjustable segmental cam elements are set to allow the first switch to remain closed only long enough to give a predetermined quantity of water from said solenoid water valve.
 9. The structure of claim 7 wherein a product solenoid is connected to a third switch and a third cam is provided on said cam shaft for actuating said third switch, said product solenoid being connected to a scoop means in a product storage container, and said third cam includes a plurality of cam actuating surfaces for actuating said third switch to provide a corresponding number of reciprocations of said scoop means to discharge the desired quantity of product from said product storage container. 